Impedance Modeling of DFIG Wind Farms with Various Rotor Speeds and Frequency Coupling

Bin Liu; Zhen Li; Haijiao Wang; Xiaoliang Dong; Wuyang Su; Guanghui Li; Xi Chen; Tyrone Fernando; Herbert H.C. Iu; Xiaoqin Lian; Xiangdong Liu

doi:10.1109/TCSII.2020.2997927

Impedance Modeling of DFIG Wind Farms with Various Rotor Speeds and Frequency Coupling

Bin Liu, Zhen Li^*, Haijiao Wang, Xiaoliang Dong, Wuyang Su, Guanghui Li, Xi Chen, Tyrone Fernando, Herbert H.C. Iu, Xiaoqin Lian, Xiangdong Liu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

The oscillation phenomenon frequently occurs in large-scale grid-connected doubly-fed induction generators (DFIG) wind farms and the impedance-based analysis has gradually become a widely used method to analyze the wind power oscillation issues. The rotor speed of each wind turbine (WT) is usually different as an important factor to determine the operating point and affect the output impedance. This brief develops a DFIG wind farm impedance model considering different rotor speeds. The impedance of each WT is firstly obtained according to various rotor speeds and all the WTs are aggregated considering the complex frequency coupling effects to describe the overall wind farm impedance. The comparison between the simplified aggregation method of wind farms and the proposed model is given to indicate that the proposed model can provide more accurate modeling and stability analysis results.

Original language	English
Article number	9102310
Pages (from-to)	406-410
Number of pages	5
Journal	IEEE Transactions on Circuits and Systems II: Express Briefs
Volume	68
Issue number	1
DOIs	https://doi.org/10.1109/TCSII.2020.2997927
Publication status	Published - Jan 2021

Keywords

Doubly fed induction generator (DFIG)
impedance modeling
rotor speed
stability analysis
wind farm

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10.1109/TCSII.2020.2997927

Cite this

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title = "Impedance Modeling of DFIG Wind Farms with Various Rotor Speeds and Frequency Coupling",

abstract = "The oscillation phenomenon frequently occurs in large-scale grid-connected doubly-fed induction generators (DFIG) wind farms and the impedance-based analysis has gradually become a widely used method to analyze the wind power oscillation issues. The rotor speed of each wind turbine (WT) is usually different as an important factor to determine the operating point and affect the output impedance. This brief develops a DFIG wind farm impedance model considering different rotor speeds. The impedance of each WT is firstly obtained according to various rotor speeds and all the WTs are aggregated considering the complex frequency coupling effects to describe the overall wind farm impedance. The comparison between the simplified aggregation method of wind farms and the proposed model is given to indicate that the proposed model can provide more accurate modeling and stability analysis results.",

keywords = "Doubly fed induction generator (DFIG), impedance modeling, rotor speed, stability analysis, wind farm",

author = "Bin Liu and Zhen Li and Haijiao Wang and Xiaoliang Dong and Wuyang Su and Guanghui Li and Xi Chen and Tyrone Fernando and Iu, {Herbert H.C.} and Xiaoqin Lian and Xiangdong Liu",

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T1 - Impedance Modeling of DFIG Wind Farms with Various Rotor Speeds and Frequency Coupling

AU - Liu, Bin

AU - Li, Zhen

AU - Wang, Haijiao

AU - Dong, Xiaoliang

AU - Su, Wuyang

AU - Li, Guanghui

AU - Chen, Xi

AU - Fernando, Tyrone

AU - Iu, Herbert H.C.

AU - Lian, Xiaoqin

AU - Liu, Xiangdong

PY - 2021/1

Y1 - 2021/1

N2 - The oscillation phenomenon frequently occurs in large-scale grid-connected doubly-fed induction generators (DFIG) wind farms and the impedance-based analysis has gradually become a widely used method to analyze the wind power oscillation issues. The rotor speed of each wind turbine (WT) is usually different as an important factor to determine the operating point and affect the output impedance. This brief develops a DFIG wind farm impedance model considering different rotor speeds. The impedance of each WT is firstly obtained according to various rotor speeds and all the WTs are aggregated considering the complex frequency coupling effects to describe the overall wind farm impedance. The comparison between the simplified aggregation method of wind farms and the proposed model is given to indicate that the proposed model can provide more accurate modeling and stability analysis results.

AB - The oscillation phenomenon frequently occurs in large-scale grid-connected doubly-fed induction generators (DFIG) wind farms and the impedance-based analysis has gradually become a widely used method to analyze the wind power oscillation issues. The rotor speed of each wind turbine (WT) is usually different as an important factor to determine the operating point and affect the output impedance. This brief develops a DFIG wind farm impedance model considering different rotor speeds. The impedance of each WT is firstly obtained according to various rotor speeds and all the WTs are aggregated considering the complex frequency coupling effects to describe the overall wind farm impedance. The comparison between the simplified aggregation method of wind farms and the proposed model is given to indicate that the proposed model can provide more accurate modeling and stability analysis results.

KW - Doubly fed induction generator (DFIG)

KW - impedance modeling

KW - rotor speed

KW - stability analysis

KW - wind farm

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ER -

Impedance Modeling of DFIG Wind Farms with Various Rotor Speeds and Frequency Coupling

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Keywords

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